#ifndef DESTABLE_H
#define DESTABLE_H
namespace des {

// IP置换矩阵
const int IP[] = { 58, 50, 42, 34, 26, 18, 10, 2,
             60, 52, 44, 36, 28, 20, 12, 4,
             62, 54, 46, 38, 30, 22, 14, 6,
             64, 56, 48, 40, 32, 24, 16, 8,
             57, 49, 41, 33, 25, 17, 9,  1,
             59, 51, 43, 35, 27, 19, 11, 3,
             61, 53, 45, 37, 29, 21, 13, 5,
             63, 55, 47, 39, 31, 23, 15, 7 };

const int IP_Inv[] = {
        40, 8, 48, 16, 56, 24, 64, 32,
        39, 7, 47, 15, 55, 23, 63, 31,
        38, 6, 46, 14, 54, 22, 62, 30,
        37, 5, 45, 13, 53, 21, 61, 29,
        36, 4, 44, 12, 52, 20, 60, 28,
        35, 3, 43, 11, 51, 19, 59, 27,
        34, 2, 42, 10, 50, 18, 58, 26,
        33, 1, 41,  9, 49, 17, 57, 25
};

// 密钥置换表，将64位密钥变成56位
const int PC_1[] = {
              57, 49, 41, 33, 25, 17, 9,
               1, 58, 50, 42, 34, 26, 18,
              10,  2, 59, 51, 43, 35, 27,
              19, 11,  3, 60, 52, 44, 36,
              63, 55, 47, 39, 31, 23, 15,
               7, 62, 54, 46, 38, 30, 22,
              14,  6, 61, 53, 45, 37, 29,
              21, 13,  5, 28, 20, 12,  4};

// 压缩置换，将56位密钥压缩成48位子密钥
const int PC_2[] = {
              14, 17, 11, 24,  1,  5,
               3, 28, 15,  6, 21, 10,
              23, 19, 12,  4, 26,  8,
              16,  7, 27, 20, 13,  2,
              41, 52, 31, 37, 47, 55,
              30, 40, 51, 45, 33, 48,
              44, 49, 39, 56, 34, 53,
              46, 42, 50, 36, 29, 32};

// 每轮左移的位数
const int shiftBits[] = {1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1};

// 扩展置换表，将 32位 扩展至 48位
const int E[] = {32,  1,  2,  3,  4,  5,
            4,  5,  6,  7,  8,  9,
            8,  9, 10, 11, 12, 13,
           12, 13, 14, 15, 16, 17,
           16, 17, 18, 19, 20, 21,
           20, 21, 22, 23, 24, 25,
           24, 25, 26, 27, 28, 29,
           28, 29, 30, 31, 32,  1};

// S盒，每个S盒是4x16的置换表，6位 -> 4位
const int S_BOX[8][4][16] = {
    {
        {14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7},
        {0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8},
        {4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0},
        {15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13}
    },
    {
        {15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10},
        {3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5},
        {0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15},
        {13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9}
    },
    {
        {10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8},
        {13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1},
        {13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7},
        {1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12}
    },
    {
        {7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15},
        {13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9},
        {10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4},
        {3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14}
    },
    {
        {2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9},
        {14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6},
        {4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14},
        {11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3}
    },
    {
        {12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11},
        {10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8},
        {9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6},
        {4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13}
    },
    {
        {4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1},
        {13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6},
        {1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2},
        {6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12}
    },
    {
        {13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7},
        {1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2},
        {7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8},
        {2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11}
    }
};

// P置换，32位 -> 32位
const int P[] = {
           16,  7, 20, 21,
           29, 12, 28, 17,
            1, 15, 23, 26,
            5, 18, 31, 10,
            2,  8, 24, 14,
           32, 27,  3,  9,
           19, 13, 30,  6,
           22, 11,  4, 25};

}
#endif // DESTABLE_H
